21251360

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{601}}^1$

素因数の和:646

約数の個数: 96

約数和(自身を含む): 57344112

約数和(自身を除く): 36092752

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 32, 34, 40, 52, 65, 68, 80, 85, 104, 130, 136, 160, 170, 208, 221, 260, 272, 340, 416, 442, 520, 544, 601, 680, 884, 1040, 1105, 1202, 1360, 1768, 2080, 2210, 2404, 2720, 3005, 3536, 4420, 4808, 6010, 7072, 7813, 8840, 9616, 10217, 12020, 15626, 17680, 19232, 20434, 24040, 31252, 35360, 39065, 40868, 48080, 51085, 62504, 78130, 81736, 96160, 102170, 125008, 132821, 156260, 163472, 204340, 250016, 265642, 312520, 326944, 408680, 531284, 625040, 664105, 817360, 1062568, 1250080, 1328210, 1634720, 2125136, 2656420, 4250272, 5312840, 10625680, 21251360]

約数ペア:

[(1, 21251360), (2, 10625680), (4, 5312840), (5, 4250272), (8, 2656420), (10, 2125136), (13, 1634720), (16, 1328210), (17, 1250080), (20, 1062568), (26, 817360), (32, 664105), (34, 625040), (40, 531284), (52, 408680), (65, 326944), (68, 312520), (80, 265642), (85, 250016), (104, 204340), (130, 163472), (136, 156260), (160, 132821), (170, 125008), (208, 102170), (221, 96160), (260, 81736), (272, 78130), (340, 62504), (416, 51085), (442, 48080), (520, 40868), (544, 39065), (601, 35360), (680, 31252), (884, 24040), (1040, 20434), (1105, 19232), (1202, 17680), (1360, 15626), (1768, 12020), (2080, 10217), (2210, 9616), (2404, 8840), (2720, 7813), (3005, 7072), (3536, 6010), (4420, 4808)]