20573980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{659}}^1$

素因数の和:898

約数の個数: 48

約数和(自身を含む): 49674240

約数和(自身を除く): 29100260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 223, 446, 659, 892, 1115, 1318, 1561, 2230, 2636, 3122, 3295, 4460, 4613, 6244, 6590, 7805, 9226, 13180, 15610, 18452, 23065, 31220, 46130, 92260, 146957, 293914, 587828, 734785, 1028699, 1469570, 2057398, 2939140, 4114796, 5143495, 10286990, 20573980]

約数ペア:

[(1, 20573980), (2, 10286990), (4, 5143495), (5, 4114796), (7, 2939140), (10, 2057398), (14, 1469570), (20, 1028699), (28, 734785), (35, 587828), (70, 293914), (140, 146957), (223, 92260), (446, 46130), (659, 31220), (892, 23065), (1115, 18452), (1318, 15610), (1561, 13180), (2230, 9226), (2636, 7805), (3122, 6590), (3295, 6244), (4460, 4613)]