261749120

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:296

約数の個数: 128

約数和(自身を含む): 658022400

約数和(自身を除く): 396273280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 79, 80, 124, 128, 155, 158, 160, 167, 248, 310, 316, 320, 334, 395, 496, 620, 632, 640, 668, 790, 835, 992, 1240, 1264, 1336, 1580, 1670, 1984, 2449, 2480, 2528, 2672, 3160, 3340, 3968, 4898, 4960, 5056, 5177, 5344, 6320, 6680, 9796, 9920, 10112, 10354, 10688, 12245, 12640, 13193, 13360, 19592, 19840, 20708, 21376, 24490, 25280, 25885, 26386, 26720, 39184, 41416, 48980, 50560, 51770, 52772, 53440, 65965, 78368, 82832, 97960, 103540, 105544, 106880, 131930, 156736, 165664, 195920, 207080, 211088, 263860, 313472, 331328, 391840, 408983, 414160, 422176, 527720, 662656, 783680, 817966, 828320, 844352, 1055440, 1567360, 1635932, 1656640, 1688704, 2044915, 2110880, 3271864, 3313280, 4089830, 4221760, 6543728, 8179660, 8443520, 13087456, 16359320, 26174912, 32718640, 52349824, 65437280, 130874560, 261749120]

約数ペア:

[(1, 261749120), (2, 130874560), (4, 65437280), (5, 52349824), (8, 32718640), (10, 26174912), (16, 16359320), (20, 13087456), (31, 8443520), (32, 8179660), (40, 6543728), (62, 4221760), (64, 4089830), (79, 3313280), (80, 3271864), (124, 2110880), (128, 2044915), (155, 1688704), (158, 1656640), (160, 1635932), (167, 1567360), (248, 1055440), (310, 844352), (316, 828320), (320, 817966), (334, 783680), (395, 662656), (496, 527720), (620, 422176), (632, 414160), (640, 408983), (668, 391840), (790, 331328), (835, 313472), (992, 263860), (1240, 211088), (1264, 207080), (1336, 195920), (1580, 165664), (1670, 156736), (1984, 131930), (2449, 106880), (2480, 105544), (2528, 103540), (2672, 97960), (3160, 82832), (3340, 78368), (3968, 65965), (4898, 53440), (4960, 52772), (5056, 51770), (5177, 50560), (5344, 48980), (6320, 41416), (6680, 39184), (9796, 26720), (9920, 26386), (10112, 25885), (10354, 25280), (10688, 24490), (12245, 21376), (12640, 20708), (13193, 19840), (13360, 19592)]