20441820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{409}}^1$

素因数の和:452

約数の個数: 144

約数和(自身を含む): 70670880

約数和(自身を除く): 50229060

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 49, 51, 60, 68, 70, 84, 85, 98, 102, 105, 119, 140, 147, 170, 196, 204, 210, 238, 245, 255, 294, 340, 357, 409, 420, 476, 490, 510, 588, 595, 714, 735, 818, 833, 980, 1020, 1190, 1227, 1428, 1470, 1636, 1666, 1785, 2045, 2380, 2454, 2499, 2863, 2940, 3332, 3570, 4090, 4165, 4908, 4998, 5726, 6135, 6953, 7140, 8180, 8330, 8589, 9996, 11452, 12270, 12495, 13906, 14315, 16660, 17178, 20041, 20859, 24540, 24990, 27812, 28630, 34356, 34765, 40082, 41718, 42945, 48671, 49980, 57260, 60123, 69530, 80164, 83436, 85890, 97342, 100205, 104295, 120246, 139060, 146013, 171780, 194684, 200410, 208590, 240492, 243355, 292026, 300615, 340697, 400820, 417180, 486710, 584052, 601230, 681394, 730065, 973420, 1022091, 1202460, 1362788, 1460130, 1703485, 2044182, 2920260, 3406970, 4088364, 5110455, 6813940, 10220910, 20441820]

約数ペア:

[(1, 20441820), (2, 10220910), (3, 6813940), (4, 5110455), (5, 4088364), (6, 3406970), (7, 2920260), (10, 2044182), (12, 1703485), (14, 1460130), (15, 1362788), (17, 1202460), (20, 1022091), (21, 973420), (28, 730065), (30, 681394), (34, 601230), (35, 584052), (42, 486710), (49, 417180), (51, 400820), (60, 340697), (68, 300615), (70, 292026), (84, 243355), (85, 240492), (98, 208590), (102, 200410), (105, 194684), (119, 171780), (140, 146013), (147, 139060), (170, 120246), (196, 104295), (204, 100205), (210, 97342), (238, 85890), (245, 83436), (255, 80164), (294, 69530), (340, 60123), (357, 57260), (409, 49980), (420, 48671), (476, 42945), (490, 41718), (510, 40082), (588, 34765), (595, 34356), (714, 28630), (735, 27812), (818, 24990), (833, 24540), (980, 20859), (1020, 20041), (1190, 17178), (1227, 16660), (1428, 14315), (1470, 13906), (1636, 12495), (1666, 12270), (1785, 11452), (2045, 9996), (2380, 8589), (2454, 8330), (2499, 8180), (2863, 7140), (2940, 6953), (3332, 6135), (3570, 5726), (4090, 4998), (4165, 4908)]