28765940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:369

約数の個数: 72

約数和(自身を含む): 71101800

約数和(自身を除く): 42335860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 149, 196, 197, 245, 298, 394, 490, 596, 745, 788, 980, 985, 1043, 1379, 1490, 1970, 2086, 2758, 2980, 3940, 4172, 5215, 5516, 6895, 7301, 9653, 10430, 13790, 14602, 19306, 20860, 27580, 29204, 29353, 36505, 38612, 48265, 58706, 73010, 96530, 117412, 146020, 146765, 193060, 205471, 293530, 410942, 587060, 821884, 1027355, 1438297, 2054710, 2876594, 4109420, 5753188, 7191485, 14382970, 28765940]

約数ペア:

[(1, 28765940), (2, 14382970), (4, 7191485), (5, 5753188), (7, 4109420), (10, 2876594), (14, 2054710), (20, 1438297), (28, 1027355), (35, 821884), (49, 587060), (70, 410942), (98, 293530), (140, 205471), (149, 193060), (196, 146765), (197, 146020), (245, 117412), (298, 96530), (394, 73010), (490, 58706), (596, 48265), (745, 38612), (788, 36505), (980, 29353), (985, 29204), (1043, 27580), (1379, 20860), (1490, 19306), (1970, 14602), (2086, 13790), (2758, 10430), (2980, 9653), (3940, 7301), (4172, 6895), (5215, 5516)]