20647380

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{257}}^1$

素因数の和:385

約数の個数: 96

約数和(自身を含む): 63108864

約数和(自身を除く): 42461484

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 103, 130, 156, 195, 206, 257, 260, 309, 390, 412, 514, 515, 618, 771, 780, 1028, 1030, 1236, 1285, 1339, 1542, 1545, 2060, 2570, 2678, 3084, 3090, 3341, 3855, 4017, 5140, 5356, 6180, 6682, 6695, 7710, 8034, 10023, 13364, 13390, 15420, 16068, 16705, 20046, 20085, 26471, 26780, 33410, 40092, 40170, 50115, 52942, 66820, 79413, 80340, 100230, 105884, 132355, 158826, 200460, 264710, 317652, 344123, 397065, 529420, 688246, 794130, 1032369, 1376492, 1588260, 1720615, 2064738, 3441230, 4129476, 5161845, 6882460, 10323690, 20647380]

約数ペア:

[(1, 20647380), (2, 10323690), (3, 6882460), (4, 5161845), (5, 4129476), (6, 3441230), (10, 2064738), (12, 1720615), (13, 1588260), (15, 1376492), (20, 1032369), (26, 794130), (30, 688246), (39, 529420), (52, 397065), (60, 344123), (65, 317652), (78, 264710), (103, 200460), (130, 158826), (156, 132355), (195, 105884), (206, 100230), (257, 80340), (260, 79413), (309, 66820), (390, 52942), (412, 50115), (514, 40170), (515, 40092), (618, 33410), (771, 26780), (780, 26471), (1028, 20085), (1030, 20046), (1236, 16705), (1285, 16068), (1339, 15420), (1542, 13390), (1545, 13364), (2060, 10023), (2570, 8034), (2678, 7710), (3084, 6695), (3090, 6682), (3341, 6180), (3855, 5356), (4017, 5140)]