20945848040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{353}}^1\times {\mathrm{2153}}^1$

素因数の和:2583

約数の個数: 128

約数和(自身を含む): 51881588640

約数和(自身を除く): 30935740600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 53, 65, 104, 106, 130, 212, 260, 265, 353, 424, 520, 530, 689, 706, 1060, 1378, 1412, 1765, 2120, 2153, 2756, 2824, 3445, 3530, 4306, 4589, 5512, 6890, 7060, 8612, 9178, 10765, 13780, 14120, 17224, 18356, 18709, 21530, 22945, 27560, 27989, 36712, 37418, 43060, 45890, 55978, 74836, 86120, 91780, 93545, 111956, 114109, 139945, 149672, 183560, 187090, 223912, 228218, 243217, 279890, 374180, 456436, 486434, 559780, 570545, 748360, 760009, 912872, 972868, 1119560, 1141090, 1216085, 1483417, 1520018, 1945736, 2282180, 2432170, 2966834, 3040036, 3800045, 4564360, 4864340, 5933668, 6080072, 7417085, 7600090, 9728680, 9880117, 11867336, 14834170, 15200180, 19760234, 29668340, 30400360, 39520468, 40280477, 49400585, 59336680, 79040936, 80560954, 98801170, 161121908, 197602340, 201402385, 322243816, 395204680, 402804770, 523646201, 805609540, 1047292402, 1611219080, 2094584804, 2618231005, 4189169608, 5236462010, 10472924020, 20945848040]

約数ペア:

[(1, 20945848040), (2, 10472924020), (4, 5236462010), (5, 4189169608), (8, 2618231005), (10, 2094584804), (13, 1611219080), (20, 1047292402), (26, 805609540), (40, 523646201), (52, 402804770), (53, 395204680), (65, 322243816), (104, 201402385), (106, 197602340), (130, 161121908), (212, 98801170), (260, 80560954), (265, 79040936), (353, 59336680), (424, 49400585), (520, 40280477), (530, 39520468), (689, 30400360), (706, 29668340), (1060, 19760234), (1378, 15200180), (1412, 14834170), (1765, 11867336), (2120, 9880117), (2153, 9728680), (2756, 7600090), (2824, 7417085), (3445, 6080072), (3530, 5933668), (4306, 4864340), (4589, 4564360), (5512, 3800045), (6890, 3040036), (7060, 2966834), (8612, 2432170), (9178, 2282180), (10765, 1945736), (13780, 1520018), (14120, 1483417), (17224, 1216085), (18356, 1141090), (18709, 1119560), (21530, 972868), (22945, 912872), (27560, 760009), (27989, 748360), (36712, 570545), (37418, 559780), (43060, 486434), (45890, 456436), (55978, 374180), (74836, 279890), (86120, 243217), (91780, 228218), (93545, 223912), (111956, 187090), (114109, 183560), (139945, 149672)]