20480880

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{167}}^1$

素因数の和:263

約数の個数: 160

約数和(自身を含む): 73995264

約数和(自身を除く): 53514384

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 73, 80, 84, 105, 112, 120, 140, 146, 167, 168, 210, 219, 240, 280, 292, 334, 336, 365, 420, 438, 501, 511, 560, 584, 668, 730, 835, 840, 876, 1002, 1022, 1095, 1168, 1169, 1336, 1460, 1533, 1670, 1680, 1752, 2004, 2044, 2190, 2338, 2505, 2555, 2672, 2920, 3066, 3340, 3504, 3507, 4008, 4088, 4380, 4676, 5010, 5110, 5840, 5845, 6132, 6680, 7014, 7665, 8016, 8176, 8760, 9352, 10020, 10220, 11690, 12191, 12264, 13360, 14028, 15330, 17520, 17535, 18704, 20040, 20440, 23380, 24382, 24528, 28056, 30660, 35070, 36573, 40080, 40880, 46760, 48764, 56112, 60955, 61320, 70140, 73146, 85337, 93520, 97528, 121910, 122640, 140280, 146292, 170674, 182865, 195056, 243820, 256011, 280560, 292584, 341348, 365730, 426685, 487640, 512022, 585168, 682696, 731460, 853370, 975280, 1024044, 1280055, 1365392, 1462920, 1706740, 2048088, 2560110, 2925840, 3413480, 4096176, 5120220, 6826960, 10240440, 20480880]

約数ペア:

[(1, 20480880), (2, 10240440), (3, 6826960), (4, 5120220), (5, 4096176), (6, 3413480), (7, 2925840), (8, 2560110), (10, 2048088), (12, 1706740), (14, 1462920), (15, 1365392), (16, 1280055), (20, 1024044), (21, 975280), (24, 853370), (28, 731460), (30, 682696), (35, 585168), (40, 512022), (42, 487640), (48, 426685), (56, 365730), (60, 341348), (70, 292584), (73, 280560), (80, 256011), (84, 243820), (105, 195056), (112, 182865), (120, 170674), (140, 146292), (146, 140280), (167, 122640), (168, 121910), (210, 97528), (219, 93520), (240, 85337), (280, 73146), (292, 70140), (334, 61320), (336, 60955), (365, 56112), (420, 48764), (438, 46760), (501, 40880), (511, 40080), (560, 36573), (584, 35070), (668, 30660), (730, 28056), (835, 24528), (840, 24382), (876, 23380), (1002, 20440), (1022, 20040), (1095, 18704), (1168, 17535), (1169, 17520), (1336, 15330), (1460, 14028), (1533, 13360), (1670, 12264), (1680, 12191), (1752, 11690), (2004, 10220), (2044, 10020), (2190, 9352), (2338, 8760), (2505, 8176), (2555, 8016), (2672, 7665), (2920, 7014), (3066, 6680), (3340, 6132), (3504, 5845), (3507, 5840), (4008, 5110), (4088, 5010), (4380, 4676)]