20680100

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{953}}^1$

素因数の和:1005

約数の個数: 72

約数和(自身を含む): 52996608

約数和(自身を除く): 32316508

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 31, 35, 50, 62, 70, 100, 124, 140, 155, 175, 217, 310, 350, 434, 620, 700, 775, 868, 953, 1085, 1550, 1906, 2170, 3100, 3812, 4340, 4765, 5425, 6671, 9530, 10850, 13342, 19060, 21700, 23825, 26684, 29543, 33355, 47650, 59086, 66710, 95300, 118172, 133420, 147715, 166775, 206801, 295430, 333550, 413602, 590860, 667100, 738575, 827204, 1034005, 1477150, 2068010, 2954300, 4136020, 5170025, 10340050, 20680100]

約数ペア:

[(1, 20680100), (2, 10340050), (4, 5170025), (5, 4136020), (7, 2954300), (10, 2068010), (14, 1477150), (20, 1034005), (25, 827204), (28, 738575), (31, 667100), (35, 590860), (50, 413602), (62, 333550), (70, 295430), (100, 206801), (124, 166775), (140, 147715), (155, 133420), (175, 118172), (217, 95300), (310, 66710), (350, 59086), (434, 47650), (620, 33355), (700, 29543), (775, 26684), (868, 23825), (953, 21700), (1085, 19060), (1550, 13342), (1906, 10850), (2170, 9530), (3100, 6671), (3812, 5425), (4340, 4765)]