25811780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{853}}^1$

素因数の和:968

約数の個数: 48

約数和(自身を含む): 58106160

約数和(自身を除く): 32294380

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 853, 890, 1513, 1706, 1780, 3026, 3412, 4265, 6052, 7565, 8530, 14501, 15130, 17060, 29002, 30260, 58004, 72505, 75917, 145010, 151834, 290020, 303668, 379585, 759170, 1290589, 1518340, 2581178, 5162356, 6452945, 12905890, 25811780]

約数ペア:

[(1, 25811780), (2, 12905890), (4, 6452945), (5, 5162356), (10, 2581178), (17, 1518340), (20, 1290589), (34, 759170), (68, 379585), (85, 303668), (89, 290020), (170, 151834), (178, 145010), (340, 75917), (356, 72505), (445, 58004), (853, 30260), (890, 29002), (1513, 17060), (1706, 15130), (1780, 14501), (3026, 8530), (3412, 7565), (4265, 6052)]