18778240

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:130

約数の個数: 128

約数和(自身を含む): 50465520

約数和(自身を除く): 31687280

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 37, 40, 52, 61, 64, 65, 74, 80, 104, 122, 128, 130, 148, 160, 185, 208, 244, 260, 296, 305, 320, 370, 416, 481, 488, 520, 592, 610, 640, 740, 793, 832, 962, 976, 1040, 1184, 1220, 1480, 1586, 1664, 1924, 1952, 2080, 2257, 2368, 2405, 2440, 2960, 3172, 3848, 3904, 3965, 4160, 4514, 4736, 4810, 4880, 5920, 6344, 7696, 7808, 7930, 8320, 9028, 9620, 9760, 11285, 11840, 12688, 15392, 15860, 18056, 19240, 19520, 22570, 23680, 25376, 29341, 30784, 31720, 36112, 38480, 39040, 45140, 50752, 58682, 61568, 63440, 72224, 76960, 90280, 101504, 117364, 126880, 144448, 146705, 153920, 180560, 234728, 253760, 288896, 293410, 307840, 361120, 469456, 507520, 586820, 722240, 938912, 1173640, 1444480, 1877824, 2347280, 3755648, 4694560, 9389120, 18778240]

約数ペア:

[(1, 18778240), (2, 9389120), (4, 4694560), (5, 3755648), (8, 2347280), (10, 1877824), (13, 1444480), (16, 1173640), (20, 938912), (26, 722240), (32, 586820), (37, 507520), (40, 469456), (52, 361120), (61, 307840), (64, 293410), (65, 288896), (74, 253760), (80, 234728), (104, 180560), (122, 153920), (128, 146705), (130, 144448), (148, 126880), (160, 117364), (185, 101504), (208, 90280), (244, 76960), (260, 72224), (296, 63440), (305, 61568), (320, 58682), (370, 50752), (416, 45140), (481, 39040), (488, 38480), (520, 36112), (592, 31720), (610, 30784), (640, 29341), (740, 25376), (793, 23680), (832, 22570), (962, 19520), (976, 19240), (1040, 18056), (1184, 15860), (1220, 15392), (1480, 12688), (1586, 11840), (1664, 11285), (1924, 9760), (1952, 9620), (2080, 9028), (2257, 8320), (2368, 7930), (2405, 7808), (2440, 7696), (2960, 6344), (3172, 5920), (3848, 4880), (3904, 4810), (3965, 4736), (4160, 4514)]