20313280

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1$

素因数の和:306

約数の個数: 112

約数和(自身を含む): 55046880

約数和(自身を除く): 34733600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 257, 260, 304, 320, 380, 416, 494, 514, 520, 608, 760, 832, 988, 1028, 1040, 1216, 1235, 1285, 1520, 1976, 2056, 2080, 2470, 2570, 3040, 3341, 3952, 4112, 4160, 4883, 4940, 5140, 6080, 6682, 7904, 8224, 9766, 9880, 10280, 13364, 15808, 16448, 16705, 19532, 19760, 20560, 24415, 26728, 33410, 39064, 39520, 41120, 48830, 53456, 63479, 66820, 78128, 79040, 82240, 97660, 106912, 126958, 133640, 156256, 195320, 213824, 253916, 267280, 312512, 317395, 390640, 507832, 534560, 634790, 781280, 1015664, 1069120, 1269580, 1562560, 2031328, 2539160, 4062656, 5078320, 10156640, 20313280]

約数ペア:

[(1, 20313280), (2, 10156640), (4, 5078320), (5, 4062656), (8, 2539160), (10, 2031328), (13, 1562560), (16, 1269580), (19, 1069120), (20, 1015664), (26, 781280), (32, 634790), (38, 534560), (40, 507832), (52, 390640), (64, 317395), (65, 312512), (76, 267280), (80, 253916), (95, 213824), (104, 195320), (130, 156256), (152, 133640), (160, 126958), (190, 106912), (208, 97660), (247, 82240), (257, 79040), (260, 78128), (304, 66820), (320, 63479), (380, 53456), (416, 48830), (494, 41120), (514, 39520), (520, 39064), (608, 33410), (760, 26728), (832, 24415), (988, 20560), (1028, 19760), (1040, 19532), (1216, 16705), (1235, 16448), (1285, 15808), (1520, 13364), (1976, 10280), (2056, 9880), (2080, 9766), (2470, 8224), (2570, 7904), (3040, 6682), (3341, 6080), (3952, 5140), (4112, 4940), (4160, 4883)]