305849840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{311}}^1\times {\mathrm{647}}^1$

素因数の和:990

約数の個数: 80

約数和(自身を含む): 752094720

約数和(自身を除く): 446244880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 311, 380, 622, 647, 760, 1244, 1294, 1520, 1555, 2488, 2588, 3110, 3235, 4976, 5176, 5909, 6220, 6470, 10352, 11818, 12293, 12440, 12940, 23636, 24586, 24880, 25880, 29545, 47272, 49172, 51760, 59090, 61465, 94544, 98344, 118180, 122930, 196688, 201217, 236360, 245860, 402434, 472720, 491720, 804868, 983440, 1006085, 1609736, 2012170, 3219472, 3823123, 4024340, 7646246, 8048680, 15292492, 16097360, 19115615, 30584984, 38231230, 61169968, 76462460, 152924920, 305849840]

約数ペア:

[(1, 305849840), (2, 152924920), (4, 76462460), (5, 61169968), (8, 38231230), (10, 30584984), (16, 19115615), (19, 16097360), (20, 15292492), (38, 8048680), (40, 7646246), (76, 4024340), (80, 3823123), (95, 3219472), (152, 2012170), (190, 1609736), (304, 1006085), (311, 983440), (380, 804868), (622, 491720), (647, 472720), (760, 402434), (1244, 245860), (1294, 236360), (1520, 201217), (1555, 196688), (2488, 122930), (2588, 118180), (3110, 98344), (3235, 94544), (4976, 61465), (5176, 59090), (5909, 51760), (6220, 49172), (6470, 47272), (10352, 29545), (11818, 25880), (12293, 24880), (12440, 24586), (12940, 23636)]