12995780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:261

約数の個数: 72

約数和(自身を含む): 32319000

約数和(自身を除く): 19323220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 89, 98, 140, 149, 178, 196, 245, 298, 356, 445, 490, 596, 623, 745, 890, 980, 1043, 1246, 1490, 1780, 2086, 2492, 2980, 3115, 4172, 4361, 5215, 6230, 7301, 8722, 10430, 12460, 13261, 14602, 17444, 20860, 21805, 26522, 29204, 36505, 43610, 53044, 66305, 73010, 87220, 92827, 132610, 146020, 185654, 265220, 371308, 464135, 649789, 928270, 1299578, 1856540, 2599156, 3248945, 6497890, 12995780]

約数ペア:

[(1, 12995780), (2, 6497890), (4, 3248945), (5, 2599156), (7, 1856540), (10, 1299578), (14, 928270), (20, 649789), (28, 464135), (35, 371308), (49, 265220), (70, 185654), (89, 146020), (98, 132610), (140, 92827), (149, 87220), (178, 73010), (196, 66305), (245, 53044), (298, 43610), (356, 36505), (445, 29204), (490, 26522), (596, 21805), (623, 20860), (745, 17444), (890, 14602), (980, 13261), (1043, 12460), (1246, 10430), (1490, 8722), (1780, 7301), (2086, 6230), (2492, 5215), (2980, 4361), (3115, 4172)]