1990509440

素因数分解:

$2^7\times 5^1\times {\mathrm{199}}^1\times {\mathrm{15629}}^1$

素因数の和:15847

約数の個数: 64

約数和(自身を含む): 4782780000

約数和(自身を除く): 2792270560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 199, 320, 398, 640, 796, 995, 1592, 1990, 3184, 3980, 6368, 7960, 12736, 15629, 15920, 25472, 31258, 31840, 62516, 63680, 78145, 125032, 127360, 156290, 250064, 312580, 500128, 625160, 1000256, 1250320, 2000512, 2500640, 3110171, 5001280, 6220342, 10002560, 12440684, 15550855, 24881368, 31101710, 49762736, 62203420, 99525472, 124406840, 199050944, 248813680, 398101888, 497627360, 995254720, 1990509440]

約数ペア:

[(1, 1990509440), (2, 995254720), (4, 497627360), (5, 398101888), (8, 248813680), (10, 199050944), (16, 124406840), (20, 99525472), (32, 62203420), (40, 49762736), (64, 31101710), (80, 24881368), (128, 15550855), (160, 12440684), (199, 10002560), (320, 6220342), (398, 5001280), (640, 3110171), (796, 2500640), (995, 2000512), (1592, 1250320), (1990, 1000256), (3184, 625160), (3980, 500128), (6368, 312580), (7960, 250064), (12736, 156290), (15629, 127360), (15920, 125032), (25472, 78145), (31258, 63680), (31840, 62516)]