18880240

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{331}}^1$

素因数の和:398

約数の個数: 80

約数和(自身を含む): 47425536

約数和(自身を除く): 28545296

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 31, 40, 46, 62, 80, 92, 115, 124, 155, 184, 230, 248, 310, 331, 368, 460, 496, 620, 662, 713, 920, 1240, 1324, 1426, 1655, 1840, 2480, 2648, 2852, 3310, 3565, 5296, 5704, 6620, 7130, 7613, 10261, 11408, 13240, 14260, 15226, 20522, 26480, 28520, 30452, 38065, 41044, 51305, 57040, 60904, 76130, 82088, 102610, 121808, 152260, 164176, 205220, 236003, 304520, 410440, 472006, 609040, 820880, 944012, 1180015, 1888024, 2360030, 3776048, 4720060, 9440120, 18880240]

約数ペア:

[(1, 18880240), (2, 9440120), (4, 4720060), (5, 3776048), (8, 2360030), (10, 1888024), (16, 1180015), (20, 944012), (23, 820880), (31, 609040), (40, 472006), (46, 410440), (62, 304520), (80, 236003), (92, 205220), (115, 164176), (124, 152260), (155, 121808), (184, 102610), (230, 82088), (248, 76130), (310, 60904), (331, 57040), (368, 51305), (460, 41044), (496, 38065), (620, 30452), (662, 28520), (713, 26480), (920, 20522), (1240, 15226), (1324, 14260), (1426, 13240), (1655, 11408), (1840, 10261), (2480, 7613), (2648, 7130), (2852, 6620), (3310, 5704), (3565, 5296)]