21478660

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{101}}^1$

素因数の和:162

約数の個数: 96

約数和(自身を含む): 54835200

約数和(自身を除く): 33356540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 98, 101, 124, 140, 155, 196, 202, 217, 245, 310, 343, 404, 434, 490, 505, 620, 686, 707, 868, 980, 1010, 1085, 1372, 1414, 1519, 1715, 2020, 2170, 2828, 3038, 3131, 3430, 3535, 4340, 4949, 6076, 6262, 6860, 7070, 7595, 9898, 10633, 12524, 14140, 15190, 15655, 19796, 21266, 21917, 24745, 30380, 31310, 34643, 42532, 43834, 49490, 53165, 62620, 69286, 87668, 98980, 106330, 109585, 138572, 153419, 173215, 212660, 219170, 306838, 346430, 438340, 613676, 692860, 767095, 1073933, 1534190, 2147866, 3068380, 4295732, 5369665, 10739330, 21478660]

約数ペア:

[(1, 21478660), (2, 10739330), (4, 5369665), (5, 4295732), (7, 3068380), (10, 2147866), (14, 1534190), (20, 1073933), (28, 767095), (31, 692860), (35, 613676), (49, 438340), (62, 346430), (70, 306838), (98, 219170), (101, 212660), (124, 173215), (140, 153419), (155, 138572), (196, 109585), (202, 106330), (217, 98980), (245, 87668), (310, 69286), (343, 62620), (404, 53165), (434, 49490), (490, 43834), (505, 42532), (620, 34643), (686, 31310), (707, 30380), (868, 24745), (980, 21917), (1010, 21266), (1085, 19796), (1372, 15655), (1414, 15190), (1519, 14140), (1715, 12524), (2020, 10633), (2170, 9898), (2828, 7595), (3038, 7070), (3131, 6860), (3430, 6262), (3535, 6076), (4340, 4949)]