31921240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1$

素因数の和:221

約数の個数: 128

約数和(自身を含む): 86002560

約数和(自身を除く): 54081320

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 23, 26, 34, 40, 46, 52, 65, 68, 85, 92, 104, 115, 130, 136, 157, 170, 184, 221, 230, 260, 299, 314, 340, 391, 442, 460, 520, 598, 628, 680, 782, 785, 884, 920, 1105, 1196, 1256, 1495, 1564, 1570, 1768, 1955, 2041, 2210, 2392, 2669, 2990, 3128, 3140, 3611, 3910, 4082, 4420, 5083, 5338, 5980, 6280, 7222, 7820, 8164, 8840, 10166, 10205, 10676, 11960, 13345, 14444, 15640, 16328, 18055, 20332, 20410, 21352, 25415, 26690, 28888, 34697, 36110, 40664, 40820, 46943, 50830, 53380, 61387, 69394, 72220, 81640, 93886, 101660, 106760, 122774, 138788, 144440, 173485, 187772, 203320, 234715, 245548, 277576, 306935, 346970, 375544, 469430, 491096, 613870, 693940, 798031, 938860, 1227740, 1387880, 1596062, 1877720, 2455480, 3192124, 3990155, 6384248, 7980310, 15960620, 31921240]

約数ペア:

[(1, 31921240), (2, 15960620), (4, 7980310), (5, 6384248), (8, 3990155), (10, 3192124), (13, 2455480), (17, 1877720), (20, 1596062), (23, 1387880), (26, 1227740), (34, 938860), (40, 798031), (46, 693940), (52, 613870), (65, 491096), (68, 469430), (85, 375544), (92, 346970), (104, 306935), (115, 277576), (130, 245548), (136, 234715), (157, 203320), (170, 187772), (184, 173485), (221, 144440), (230, 138788), (260, 122774), (299, 106760), (314, 101660), (340, 93886), (391, 81640), (442, 72220), (460, 69394), (520, 61387), (598, 53380), (628, 50830), (680, 46943), (782, 40820), (785, 40664), (884, 36110), (920, 34697), (1105, 28888), (1196, 26690), (1256, 25415), (1495, 21352), (1564, 20410), (1570, 20332), (1768, 18055), (1955, 16328), (2041, 15640), (2210, 14444), (2392, 13345), (2669, 11960), (2990, 10676), (3128, 10205), (3140, 10166), (3611, 8840), (3910, 8164), (4082, 7820), (4420, 7222), (5083, 6280), (5338, 5980)]