21172900

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{149}}^1$

素因数の和:206

約数の個数: 108

約数和(自身を含む): 55660500

約数和(自身を除く): 34487600

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 29, 35, 49, 50, 58, 70, 98, 100, 116, 140, 145, 149, 175, 196, 203, 245, 290, 298, 350, 406, 490, 580, 596, 700, 725, 745, 812, 980, 1015, 1043, 1225, 1421, 1450, 1490, 2030, 2086, 2450, 2842, 2900, 2980, 3725, 4060, 4172, 4321, 4900, 5075, 5215, 5684, 7105, 7301, 7450, 8642, 10150, 10430, 14210, 14602, 14900, 17284, 20300, 20860, 21605, 26075, 28420, 29204, 30247, 35525, 36505, 43210, 52150, 60494, 71050, 73010, 86420, 104300, 108025, 120988, 142100, 146020, 151235, 182525, 211729, 216050, 302470, 365050, 423458, 432100, 604940, 730100, 756175, 846916, 1058645, 1512350, 2117290, 3024700, 4234580, 5293225, 10586450, 21172900]

約数ペア:

[(1, 21172900), (2, 10586450), (4, 5293225), (5, 4234580), (7, 3024700), (10, 2117290), (14, 1512350), (20, 1058645), (25, 846916), (28, 756175), (29, 730100), (35, 604940), (49, 432100), (50, 423458), (58, 365050), (70, 302470), (98, 216050), (100, 211729), (116, 182525), (140, 151235), (145, 146020), (149, 142100), (175, 120988), (196, 108025), (203, 104300), (245, 86420), (290, 73010), (298, 71050), (350, 60494), (406, 52150), (490, 43210), (580, 36505), (596, 35525), (700, 30247), (725, 29204), (745, 28420), (812, 26075), (980, 21605), (1015, 20860), (1043, 20300), (1225, 17284), (1421, 14900), (1450, 14602), (1490, 14210), (2030, 10430), (2086, 10150), (2450, 8642), (2842, 7450), (2900, 7301), (2980, 7105), (3725, 5684), (4060, 5215), (4172, 5075), (4321, 4900)]