2400020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:133

約数の個数: 72

約数和(自身を含む): 6128640

約数和(自身を除く): 3728620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 79, 98, 124, 140, 155, 158, 196, 217, 245, 310, 316, 395, 434, 490, 553, 620, 790, 868, 980, 1085, 1106, 1519, 1580, 2170, 2212, 2449, 2765, 3038, 3871, 4340, 4898, 5530, 6076, 7595, 7742, 9796, 11060, 12245, 15190, 15484, 17143, 19355, 24490, 30380, 34286, 38710, 48980, 68572, 77420, 85715, 120001, 171430, 240002, 342860, 480004, 600005, 1200010, 2400020]

約数ペア:

[(1, 2400020), (2, 1200010), (4, 600005), (5, 480004), (7, 342860), (10, 240002), (14, 171430), (20, 120001), (28, 85715), (31, 77420), (35, 68572), (49, 48980), (62, 38710), (70, 34286), (79, 30380), (98, 24490), (124, 19355), (140, 17143), (155, 15484), (158, 15190), (196, 12245), (217, 11060), (245, 9796), (310, 7742), (316, 7595), (395, 6076), (434, 5530), (490, 4898), (553, 4340), (620, 3871), (790, 3038), (868, 2765), (980, 2449), (1085, 2212), (1106, 2170), (1519, 1580)]