21903980

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{103}}^1$

素因数の和:164

約数の個数: 96

約数和(自身を含む): 55910400

約数和(自身を除く): 34006420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 98, 103, 124, 140, 155, 196, 206, 217, 245, 310, 343, 412, 434, 490, 515, 620, 686, 721, 868, 980, 1030, 1085, 1372, 1442, 1519, 1715, 2060, 2170, 2884, 3038, 3193, 3430, 3605, 4340, 5047, 6076, 6386, 6860, 7210, 7595, 10094, 10633, 12772, 14420, 15190, 15965, 20188, 21266, 22351, 25235, 30380, 31930, 35329, 42532, 44702, 50470, 53165, 63860, 70658, 89404, 100940, 106330, 111755, 141316, 156457, 176645, 212660, 223510, 312914, 353290, 447020, 625828, 706580, 782285, 1095199, 1564570, 2190398, 3129140, 4380796, 5475995, 10951990, 21903980]

約数ペア:

[(1, 21903980), (2, 10951990), (4, 5475995), (5, 4380796), (7, 3129140), (10, 2190398), (14, 1564570), (20, 1095199), (28, 782285), (31, 706580), (35, 625828), (49, 447020), (62, 353290), (70, 312914), (98, 223510), (103, 212660), (124, 176645), (140, 156457), (155, 141316), (196, 111755), (206, 106330), (217, 100940), (245, 89404), (310, 70658), (343, 63860), (412, 53165), (434, 50470), (490, 44702), (515, 42532), (620, 35329), (686, 31930), (721, 30380), (868, 25235), (980, 22351), (1030, 21266), (1085, 20188), (1372, 15965), (1442, 15190), (1519, 14420), (1715, 12772), (2060, 10633), (2170, 10094), (2884, 7595), (3038, 7210), (3193, 6860), (3430, 6386), (3605, 6076), (4340, 5047)]